Protected insulator.



Patented Jan. 19, 1909.

J. H. B. REA.

PROTECTED INSULATOR.

PPLIOATION FILED MAY 7, 1908 909,935.

WITNESSES A m proved protective insulator.

more particularly to the ordinary sulator in. combination with a un t-run sTA s PATENT oFF oE."

JOHN H. B. REA, or LA FAYIIJTTE, GEORGIA.

I PROTEGTED msuna'ron.

Specification of Letters Patent.

Patented a... 19, 1909.

.. Application flledliayfi, 1908. Serial No. 431,409.

strong non-breakable protective covering which may be readily and firmly secured thereon.

.Further objects and advantages of mypresent invention will appear in the course 2o f ings, forming a part of this which like numerals are use ence is 'made to the accompanying drawof the following.description, in which refers ecification, in to designate like parts throughout the several figures, and in which Figure l is a side elevation of my im- Fi 2 is a central vertical sectional view taken therethrough, and Fig. 3 is a horizontal sectional piew taken therethrough on the line 33 of ig; 2. a

-'In the practical embodiment of my invention, I provide a glass or other breakable in-' sulator 1, of the ordinary construction, having ajcentrally threaded bore forvthe' reception of the ordinary wooden insulator pin 2,'

and provided with a semi-circular channel 3, in its circumferential, face, with a sheet metal'casing 4 of the same general shape with the contour of said insulator 1,though of substantially larger size, and having a circumferential depressed channel 5 to aline with the circumferential groove 3, of the insulator;

Between the insulator l and its protec'tive casing 4, is poured cement 6, in its plastic state, and the insulator l'is' then worked and turned. within said casing 4: to obtain a uniform layer of said cement and to work the same well within its groove 3, and about the depression 5 of the casing" 4'. When the cement 6 has become thoroughly and evenly distributed between the insulator.

' and its casing,

. same together,

ternal surface of the said insulator,

face and left to allow the cement 6 to become hard.

the same may be placed with their lower circular edges upon a flat sur- From the foregoing, it will be seen thatl am enabled to providethe ordinary insulator of glass or other breakable material, with a strong protective cover which may be readily and firmly secured thereto, and which will withstand shocks that ordinarily breakthe insulator.

Having fully described my invention, I

claim: 7 v

1. An insulator of the character described, comprising a breakable insulating body, a metallic casing wholly surrounding the external surface of the same and of the same general shape as the contour of-said body portion though of increased dimensions, and a uniformly distributed layer of cementing material interposed between said insulator body and the said casing to firmly lock the substantially as described.

2. A protective covering for glass and other breakable insulators, having circumferential wire holding grooves, comprising a metal casing wholly surrounding the exvided with circumferential depressions to aline with the said wire holdin grooves thereof, and a cementing material interposed'between saidinsulator and said casing, andwithin and about the said grooves and depressions such material, between the insulator and said casing, by movement of said insulator.

therein, substantially. as described. In testimony whereof I afiix my signature in presence of two witnesses.

JOHN H. B. REA.

Witnesses:

H. P. LUMPKrN, Pam; D. Wmenr.

and prothereof to firmly lock the same together, substantially as described.

to form a uniform layer of 

